Oxygen's two-hour event on the infamous Drew Peterson case airs on Friday, August 25th at 9/8c.

He wasn’t the only husband who almost got away with killing his wife. Take a look at these five cases in which the husbands (including Drew) almost got away with murder.

1. Harold Henthorn

Harold Henthorn was convicted and sentenced to life in prison for shoving his second wife, Toni Henthorn, off a cliff at Rocky Mountain National Park in 2012. Harold claimed she fell, and he almost got away with it. Two years later, he was arrested. Police found that he possessed a map with an X at the spot where she died. Harold also took out a $4.7 million in life insurance policies from his wife. Soon, he also became a serious person of interest for the death of his first wife, Sandra “Lynn” Henthorn, who was found dead beside Colorado Highway 67 in 1995. That case was originally ruled an accident despite the fact that she and Harold took out a $500,000 life insurance policy just months before the death. His murder conviction for the second wife re-opened the investigation of the first one.

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2. Richard Dabate

This husband possibly would have gotten away with murder if it wasn’t for his slain wife’s Fitbit. Police initially thought the 2015 murder of Connie Dabate was a home invasion gone wrong. Police arrived to the Ellington, Connecticut home to find Connie shot dead with Richard’s gun. He was partially zip-tied to a chair, unharmed. He claimed a masked intruder killed his wife. But Connie's Fitbit told a different story. In fact, it showed that she was moving around for almost an hour after Richard said that she was killed. Another contradiction to his story: She was active on Facebook after she was allegedly murdered by the “masked intruder.” He will be back in court this September to face murder charges.

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3. John List

This New Jersey man almost got away with not only killing his wife, but his entire family. After he lost his job, the religious man began to crack. He suspected his family of leading “unholy lives.” In 1971, he killed his wife Helen, his mother their three children. Before killing them, he coldly and meticulously cancelled mail delivery. He also informed his children’s school and his adult family member’s workplaces that they would be out of town visiting family in North Carolina. Then, after he killed them all, he fled town and took on a new identity in Colorado. His planning meant that nobody noticed that the family was missing until nearly a month later. An episode of America’s Most Wanted led to his capture 18 years later. He died in prison in 2008.

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4. Drew Peterson

Drew Peterson was a cop who has been implicated in the deaths of two of his four ex-wives. His second wife later admitted that she was abused. He even threatened to kill her and make it look like an accident. Peterson’s third wife, Kathleen Savio was found dead in a waterless bathtub in 2003. Her death was ruled an accident. But, in 2007, his fourth wife Stacy Ann Peterson (nee Cales) went missing. His third wife’s body was exhumed and a medical examiner determined she was strangled before drowning. Peterson has been convicted of killing her and he is supsected in killing Stacy, too.

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5. Adrian Prout

Millionaire Adrian Prout claimed that his wife ran off 2007. In reality, he murdered her during a fight about their impending divorce. Police couldn’t locate Kate Prout’s body anywhere on the couple’s 276-acre Gloucestershire, England estate. What led to his arrest was after his new girlfriend convinced him to take a lie detector test to prove his innocence. Well, that didn’t work. He failed and soon after confessed to the murder. He then led police to his wife’s remains in 2011, almost four years after her death.